atmel-flexcom.txt (1810B)
1* Device tree bindings for Atmel Flexcom (Flexible Serial Communication Unit) 2 3The Atmel Flexcom is just a wrapper which embeds a SPI controller, an I2C 4controller and an USART. Only one function can be used at a time and is chosen 5at boot time according to the device tree. 6 7Required properties: 8- compatible: Should be "atmel,sama5d2-flexcom" 9- reg: Should be the offset/length value for Flexcom dedicated 10 I/O registers (without USART, TWI or SPI registers). 11- clocks: Should be the Flexcom peripheral clock from PMC. 12- #address-cells: Should be <1> 13- #size-cells: Should be <1> 14- ranges: Should be one range for the full I/O register region 15 (including USART, TWI and SPI registers). 16- atmel,flexcom-mode: Should be one of the following values: 17 - <1> for USART 18 - <2> for SPI 19 - <3> for I2C 20 21Required child: 22A single available child device of type matching the "atmel,flexcom-mode" 23property. 24 25The phandle provided by the clocks property of the child is the same as one for 26the Flexcom parent. 27 28For other properties, please refer to the documentations of the respective 29device: 30- ../serial/atmel-usart.txt 31- ../spi/spi_atmel.txt 32- ../i2c/i2c-at91.txt 33 34Example: 35 36flexcom@f8034000 { 37 compatible = "atmel,sama5d2-flexcom"; 38 reg = <0xf8034000 0x200>; 39 clocks = <&flx0_clk>; 40 #address-cells = <1>; 41 #size-cells = <1>; 42 ranges = <0x0 0xf8034000 0x800>; 43 atmel,flexcom-mode = <2>; 44 45 spi@400 { 46 compatible = "atmel,at91rm9200-spi"; 47 reg = <0x400 0x200>; 48 interrupts = <19 IRQ_TYPE_LEVEL_HIGH 7>; 49 pinctrl-names = "default"; 50 pinctrl-0 = <&pinctrl_flx0_default>; 51 #address-cells = <1>; 52 #size-cells = <0>; 53 clocks = <&flx0_clk>; 54 clock-names = "spi_clk"; 55 atmel,fifo-size = <32>; 56 57 flash@0 { 58 compatible = "atmel,at25f512b"; 59 reg = <0>; 60 spi-max-frequency = <20000000>; 61 }; 62 }; 63};